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Question:
(a) Besides privacy, what other security functions does Pretty Good Privacy (PGP) provides?
(b) What is the Post Office Protocol (POP) used for? Why is it important that POP uses authentication, whereas the Simple Mail Transfer Protocol (SMTP) does not?
(c) When worms attack the e-mail client, the e-mail servers (the Mail Transfer Agent (MTA) and the Mail Delivery Agent (MDA)) get overwhelmed as well. Explain why.
(d) What do you meant by spam? Blocking lists are typically used to prevent spam. Discuss the effectiveness of using blocking list. How do ISPs prevent their clients from sending spam?
(e) What do you understand by the term Virtual Private network (VPN)? Describe how IPSec can be used to implement a VPN.
(f) Compare and contrast IPSec and SSH.
ACCESS CONTROL DEVICES Successful access control system includes number of components, which depends on system’s requirements for authentication and authorization. Powerful auth
WIRELESS SECURITY TOOLS An organization which spends its time securing wired network and leaves wireless networks to operate in any manner is opening itself up for security brea
Network security is an issue for companies regardless of whether they participate in electronic commerce; however, since most organizations have a Web site that allows some interac
Example : UCSF Medical Center In the year 2002, the University of California, San Francisco (UCSF) Medical Center received an email message from someone who claimed to be a doct
Discuss how developers should apply the following countermeasures to improve the security of their code:
- Alice, Bob and Charlie have a secret key a=3, b=4, c=5, in that order. - They would like to find a common secret key using Diffie-Hellan key exchange protocol (with g=2, p=5).
How much would it cost to have a project completed by tomorrow night?
Unguided Media This is the wireless media that transfer electromagnetic waves without using a physical media. Waves are broadcast through the air. This is performing through r
How safe is the encryption of virtual private networks?
Bridges perform both in the data link layers and physical of LANs of same kind. They split a bigger network in to smaller segments. They have logic that accept them to store the
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